| /******************************************************************************* |
| * Copyright (c) 2004, 2008 Tasktop Technologies and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.tasks.ui.notifications; |
| |
| import java.text.MessageFormat; |
| import java.util.List; |
| |
| import org.eclipse.mylyn.tasks.core.IRepositoryPerson; |
| import org.eclipse.mylyn.tasks.core.ITaskComment; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Drawable; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.widgets.Composite; |
| |
| /** |
| * @author Steffen Pingel |
| */ |
| public class TaskDiffUtil { |
| |
| private static final String ELLIPSIS = "..."; //$NON-NLS-1$ // could use the ellipsis glyph on some platforms "\u2026" |
| |
| private static int DRAW_FLAGS = SWT.DRAW_MNEMONIC | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER; |
| |
| public static String commentToString(ITaskComment comment) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(MessageFormat.format(Messages.TaskDiffUtil_Comment_by_X, personToString(comment.getAuthor()))); |
| sb.append(": "); //$NON-NLS-1$ |
| sb.append(cleanCommentText(comment.getText())); |
| return sb.toString(); |
| } |
| |
| private static String personToString(IRepositoryPerson author) { |
| if (author == null) { |
| return Messages.TaskDiffUtil_Unknown; |
| } else if (author.getName() != null) { |
| return author.getName(); |
| } |
| return author.getPersonId(); |
| } |
| |
| public static String cleanCommentText(String value) { |
| String text = ""; //$NON-NLS-1$ |
| String[] lines = value.split("\n"); //$NON-NLS-1$ |
| boolean attachment = false; |
| boolean needSeparator = false; |
| for (String line : lines) { |
| // skip comments and info lines |
| if (attachment) { |
| text += Messages.TaskDiffUtil_attachment + line; |
| needSeparator = true; |
| attachment = false; |
| } else if (line.startsWith(">") // //$NON-NLS-1$ |
| || line.matches("^\\s*\\(In reply to comment.*")) { //$NON-NLS-1$ |
| needSeparator = true; |
| continue; |
| } else if (line.startsWith("Created an attachment (id=")) { //$NON-NLS-1$ |
| attachment = true; |
| } else { |
| if (needSeparator) { |
| if (!text.matches(".*\\p{Punct}\\s*")) { //$NON-NLS-1$ |
| text = text.trim(); |
| if (text.length() > 0) { |
| text += "."; //$NON-NLS-1$ |
| } |
| } |
| } |
| text += " " + line; //$NON-NLS-1$ |
| attachment = false; |
| needSeparator = false; |
| } |
| } |
| return foldSpaces(text); |
| } |
| |
| public static String listToString(List<String> values) { |
| if (values == null) { |
| return ""; //$NON-NLS-1$ |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| boolean first = true; |
| for (String value : values) { |
| if (!first) { |
| sb.append(", "); //$NON-NLS-1$ |
| } else { |
| first = false; |
| } |
| sb.append(foldSpaces(value)); |
| } |
| return sb.toString(); |
| } |
| |
| public static String foldSpaces(String value) { |
| return value.replaceAll("\\s+", " ").trim(); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| public static String trim(String value, int length) { |
| if (value.length() > length) { |
| value = value.substring(0, length - 3) + "..."; //$NON-NLS-1$ |
| } |
| return value; |
| } |
| |
| /** |
| * Note: Copied from CLabel. |
| * |
| * Shorten the given text <code>t</code> so that its length doesn't exceed the given width. The default |
| * implementation replaces characters in the center of the original string with an ellipsis ("..."). Override if you |
| * need a different strategy. |
| * |
| * @param gc |
| * the gc to use for text measurement |
| * @param t |
| * the text to shorten |
| * @param width |
| * the width to shorten the text to, in pixels |
| * @return the shortened text |
| */ |
| public static final String shortenText2(Composite composite, String t, int width) { |
| GC gc = new GC(composite); |
| |
| if (t == null) { |
| return null; |
| } |
| int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x; |
| if (width <= w) { |
| return t; |
| } |
| int l = t.length(); |
| int max = l / 2; |
| int min = 0; |
| int mid = (max + min) / 2 - 1; |
| if (mid <= 0) { |
| return t; |
| } |
| while (min < mid && mid < max) { |
| String s1 = t.substring(0, mid); |
| String s2 = t.substring(l - mid, l); |
| int l1 = gc.textExtent(s1, DRAW_FLAGS).x; |
| int l2 = gc.textExtent(s2, DRAW_FLAGS).x; |
| if (l1 + w + l2 > width) { |
| max = mid; |
| mid = (max + min) / 2; |
| } else if (l1 + w + l2 < width) { |
| min = mid; |
| mid = (max + min) / 2; |
| } else { |
| min = max; |
| } |
| } |
| |
| gc.dispose(); |
| |
| if (mid == 0) { |
| return t; |
| } |
| return t.substring(0, mid) + ELLIPSIS + t.substring(l - mid, l); |
| } |
| |
| // From PerspectiveBarContributionItem |
| public static String shortenText(Drawable composite, String text, int maxWidth) { |
| String returnText = text; |
| GC gc = new GC(composite); |
| if (gc.textExtent(text).x > maxWidth) { |
| for (int i = text.length(); i > 0; i--) { |
| String subString = text.substring(0, i); |
| subString = subString + "..."; //$NON-NLS-1$ |
| if (gc.textExtent(subString).x < maxWidth) { |
| returnText = subString; |
| break; |
| } |
| } |
| } |
| gc.dispose(); |
| return returnText; |
| } |
| |
| } |